changed background color in navigation menu
Merge branch 'WEB-42' into master_design
modified background-color of navigationmenu
Merge branch 'master_design' of github.com:Catrobat/Catroweb into master_design
featured image resized
Merge branch 'master_design' of github.com:Catrobat/Catroweb into master_design
Merge branch 'featuredImage' into master_design